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We focus on a holographic approach to DIS at small-x in high energy where scattering is dominated by exchanging a Reggeized Graviton in $AdS_5$. We emphasize the importance of confinement, which corresponds to a deformation of $AdS_5$…

High Energy Physics - Phenomenology · Physics 2015-08-21 Richard C. Brower , Marko Djurić , Timothy Raben , Chung-I Tan

We extend the scaling behaviour observed in the inclusive charged hadron transverse momentum ($p_{T}$) distributions to the $p_{T}$ spectra of pions, kaons and protons produced in proton-proton ($pp$) collisions with center of mass energies…

High Energy Physics - Phenomenology · Physics 2015-12-10 W. C. Zhang

We investigate the possibility to identify photon-gluon fusion (PGF) events in polarised deep inelastic ep scattering, assuming the kinematics of the HERA collider, by a pair of charged high p_t particles. In a Monte Carlo study we find…

High Energy Physics - Phenomenology · Physics 2007-05-23 G. Radel , A. De Roeck

The NA61/SHINE experiment aims to discover the critical point of strongly interacting matter and study the properties of the onset of deconfinement. This is performed by a two dimensional phase diagram ($T-\mu_B$) scan of measurements of…

Nuclear Experiment · Physics 2019-08-14 Katarzyna Grebieszkow

Generalization of z-scaling observed in the inclusive high-pT charged hadron and jet production is proposed. The scaling function psi(z) describing both charged hadrons and jets produced in proton-(anti)proton collisions for various…

High Energy Physics - Phenomenology · Physics 2011-03-23 I. Zborovsky , M. Tokarev

As a complementary study to that performed on the transverse momentum ($p_{\rm T}$) spectra of charged pions, kaons and protons in proton-proton (pp) collisions at LHC energies 0.9, 2.76 and 7 TeV, we present a scaling behaviour in the…

High Energy Physics - Phenomenology · Physics 2018-04-12 Liwen Yang , Yanyun Wang , Wenhui Hao , Na Liu , Xiaoling Du , Wenchao Zhang

Multiplicity, rapidity and transverse momentum distributions of hadrons produced both in inelastic and nondiffractive $pp$ collisions at energies from $\sqrt{s} = 200$\,GeV to 14\,TeV are studied within the Monte Carlo quark-gluon string…

High Energy Physics - Phenomenology · Physics 2016-06-15 J. Bleibel , L. V. Bravina , E. E. Zabrodin

We discuss scaling properties of the elastic $pp$ cross-section both at the ISR and the LHC. We observe that the ratio of bump to dip positions of the differential cross-section $d\sigma_{\rm el}/dt$ is constant over a wide energy range. We…

High Energy Physics - Phenomenology · Physics 2025-01-27 Michał Praszałowicz , Cristian Baldenegro , Christophe Royon , Anna M. Staśto

In order to explain a striking symmetry of the HERA data for virtual photon-proton cross section, I propose a simple model based on the elementary 2-gluon exchange dipole-dipole cross section, and which exhibits geometric scaling. I also…

High Energy Physics - Phenomenology · Physics 2007-05-23 S. Munier

We study the multiplicity distributions of events with hard jets in proton-proton collisions at LHC energies using PYTHIA 8 Monte-Carlo simulations. We demonstrate that the charged-hadron multiplicity distributions scale with jet momentum.…

High Energy Physics - Phenomenology · Physics 2024-09-18 Robert Vertesi , Antal Gemes , Gergely Gabor Barnafoldi

In this paper, we show that multiplicity spectra of direct photons in A+A and d+Au collisions at different centrality classes and different energies exhibit geometrical scaling, {\em i.e.}, they depend on a specific combination of number of…

Nuclear Theory · Physics 2023-04-26 Vladimir Khachatryan , Michal Praszalowicz

We argue that the production of Mueller-Navelet jets at the LHC represents a convenient environment to study gluon saturation and high energy scattering in the presence of unitarity corrections. We show that, in a suitable range of…

High Energy Physics - Phenomenology · Physics 2008-11-26 E. Iancu , M. S. Kugeratski , D. N. Triantafyllopoulos

We show that geometrical scaling exhibited by the $p_{\rm T}$ spectra measured by the CMS collaboration at the LHC is substantially improved if the exponent $\lambda$ of the saturation scale depends on $p_{\rm T}$. This dependence is shown…

High Energy Physics - Phenomenology · Physics 2015-03-17 Michal Praszalowicz

We show that the centrality dependence of the multiplicity is identical in Pb+Pb and Xe+Xe collisions at the LHC, up to a constant factor. This geometric scaling is revealed if one defines centrality according to impact parameter, as…

Nuclear Theory · Physics 2019-01-23 Rudolph Rogly , Giuliano Giacalone , Jean-Yves Ollitrault

As it is well known by now, the pre-partonic phase in hadron collisions is successfully described by the Color Glass Condensate (CGC) approach. Previous studies, based on experimental data obtained on a wide range of energies at the…

High Energy Physics - Phenomenology · Physics 2021-11-17 A. Lindner , M. Petrovici , A. Pop

NA61/SHINE at the CERN SPS is a fixed-target experiment pursuing a rich physics program including measurements for heavy ion, neutrino and cosmic ray physics. The main goal of the ion program is to explore the most interesting $T, mu_{B}$…

Nuclear Experiment · Physics 2013-04-16 Maciej Rybczynski

The fixed-target NA61/SHINE experiment (SPS CERN) looks for the critical point of strongly interacting matter and the properties of the onset of deconfinement. It is a two dimensional scan of measurements of particle spectra and…

High Energy Physics - Experiment · Physics 2018-07-01 Ludwik Turko

We demonstrate that the RHIC data for hadron production in d-Au collisions for all available rapidities are compatible with geometric scaling. In order to establish the presence of scaling violations expected from small-x evolution a much…

High Energy Physics - Phenomenology · Physics 2009-04-30 Daniel Boer , Andre Utermann , Erik Wessels

The NA61/SHINE experiment aims to discover the critical point of strongly interacting matter and study the properties of the onset of deconfinement. These goals are to be achieved by performing a two dimensional phase diagram (T-\mu_B) scan…

Nuclear Experiment · Physics 2019-08-14 Tobiasz Czopowicz , Bartosz Maksiak

In view of the recent WA98 data of pi0 spectra from central Pb+Pb collisions at the CERN SPS, we analyze the production of neutral pions for A+$ collisions across the periodic table at sqrt(s)=17 AGeV and 200 AGeV within the framework of…

Nuclear Theory · Physics 2007-05-23 Dinesh K. Srivastava , Klaus Geiger